AC Decimal fractions EA Place Value Practice with hundredths AA We are learning to use tenths and hundredths AM Example: Fill in your worksheet as shown Example: 5345.63 AP 1000 100 10 1 5 3 4 5 Expanded number: 5000 +300 + 40 + 1 + 1 10 6 1 100 3 6 3 + 10 100 Exercise 1 What to do 1) Fill in your work sheet 2) Then write the number in expanded form 1) 134.52 (2) 8.75 (3) 12.15 4) 418.91 (5) 23.83 (6) 21.61 7) 0.56 (8) 0.03 (9) 3.09 10) 215.25 (11) 17 (12) 8675 13) 1569 (14) 1045.08 (15) 380.14 16) 99.4 (17) 0.05 (18) 0.31 19) 4104.38 (20) 800.52 Exercise 2 What to do: Write the expanded numbers as a decimal fraction Question 1 2 3 4 5 6 1000 100 6 3 3 2 4 10 1 8 3 2 9 4 8 1 10 1 1 100 4 6 6 8 5 7 4 8 Question 1000 7 8 9 10 11 12 100 10 1 7 2 7 9 4 1 6 3 8 3 4 9 7 1 10 7 1 100 4 6 2 8 2 5 8 Exercise 3 On the diagram provided colour in the decimal fraction 1) 0.7 2) 0.2 3) 0.4 4) 0.15 1) 2) 3) 4) 5) 0.95 5) On the diagram provided colour in the decimal fraction 6) a) 0.64 in red and 0.23 in blue b) Now write as a fraction the total area shaded. Where possible simplify the fraction c) Now write the area not shaded as a decimal fraction. 7) a) 0.38 in red and 0.49 in blue b) Now write as a fraction the total area shaded. Where possible simplify the fraction c) Now write the area not shaded as a decimal fraction. Exercise 4 Write each of the following as a mixed number and a decimal 113 13 Example =1 = 1.13 100 100 24 15 (2) (3) 1) 100 100 14 100 4) 36 100 (5) 70 100 (6) 38 100 7) 140 100 (8) 101 100 (9) 34 100 10) 148 100 Exercise 5 Underline the hundreds in each question 1) 86,243.1 (2) 2,726.73 (3) 90,000 4) 1,234.6 (5) 1,167.9 (6) 2,450.012 7) 45,659.345 (8) 12,345.8 (9) 456.67 10) 9,012.89 (11) 5,578.897 (12) 58,921.21 (3) 78.04 Exercise 6 Put a circle around the digit in the hundredths place 1) 24.741 (2) 1.8932 4) 567.15 (5) 4536.407 Exercise 7 Add one hundredth ( 1 ) to each of these numbers 100 1) 0.7 (2) 0.38 (3) 12.09 4) 24.45 (5) 12.64 (6) 168.42 7) 2 145.2 (8) 10 (9) 23.99 10) 8 847 (11) 974 211 (12) 644.09 13) 0.77 (14) 329.89 (15) 2 327.82 16) 1 000.09 (17) 60 000.5 (18) 45.89 Exercise 8 Take one hundreth ( 1 ) from each of these numbers 100 1) 39.68 (2) 32.14 (3) 123.71 4) 0.82 (5) 45.74 (6) 56.10 7) 286.01 (8) 39.5 (9) 8.20 10) 478.300 (11) 100.00 (12) 10.01 Exercise 9 1) 445.19 + .01 (2) 698.34 + .01 (3) 999.99 + .01 4) 329.20 + .01 (5) 4249.54 + .01 (6) 204.04 + .01 7) 3000.99 + .01 (8) 49.09 + .01 (9) 5015.34 + .01 Exercise 10 1) 321.73 - 0.01 (2) 90.76 - 0.01 (3) 603.49 - 0.01 4) 819.02 - 0.01 (5) 3001.04 - 0.01 (6) 6004.71 – 0.01 7) 30.00 - 0.01 (8) 6.55 - 0.01 (9) 20.01 - 0.01 10) 1 - 0.01 (11) 0.58 - 0.01 (12) 88.27 - 0.01 13) 436.12 - 0.01 (14) 0.07 - 0.03 (15) 7890 .21 - 0.01 Exercise 11 1) 2) 3) 4) 5) 6) 7) What digit is in the tens place? 395.98 What digit is in the tenths place? 1125.683 What digit is in the hundredths place? 345.891 What digit is in the hundreds place? 2349.782 Write a 3 digit number with 6 in the hundredths place? Write a 4 digit number with 6 in the hundreds place? Write a 2 digit number with 5 in the hundredths place Exercise 12 On each of the number lines below, the 4 arrows are pointing to different numbers. Write down what numbers they are. 1) (a) 0 2) (c) (b) (d) 1 .5 (a) (c) (b) 40 (d) 50 45 3) (a) (c) (b) (d) 201 200 Exercise 13 Write as a decimal fraction (if possible simplify) 2 100 1) 6 lots of 4) 15 5 lots of 100 7) 8) 9) 1 100 (2) 4 lots of (5) 12 6 lots of 100 2 100 (3) 2 lots of (6) 120 4 lots of 100 In your maths book, write six problems of your own like those above. Work out the answers for them then swap books with another member of your group. While you check that their problems are correct, they will check the ones you have written. Write and answer 3 more problems but this time use a multiplication sign in the problem Write one word problem about multiplying hundredths. Hand this in to your teacher for marking Exercise 14 Write as a decimal fraction (if possible simplify) 1) 0.03 × 4 (2) 0.02 × 2 (3) 0.01 × 5 4) 1.03 × 3 (5) 2.01 × 2 (6) 1.03 × 3 7) 12.02 × 3 (8) 11 × 0.05 (9) 0.06 × 5 10) 0.07 × 9 (11) 0.05 × 8 (12) 0.04 ×16 13) 12 × 0.04 (14) 7 × 0.08 (15) 20 × 0.03 Exercise one worksheet Question 1 2 3 4 5 6 7 8 9 10 11 12 13 15 16 17 18 19 20 1000 100 10 1 1 10 1 100 Expanded number Place Value Practice (Hundredths) Answers Exercise 1 100 10 1 1 10 1 100 1 3 4 5 2 8 7 5 1 2 1 5 1 8 9 1 5 2 3 8 3 6 2 1 6 1 5 6 Question 1000 1 2 3 4 4 7 8 3 9 3 10 11 12 13 15 8 1 1 2 1 5 6 5 0 1 7 6 4 7 5 9 5 9 9 16 9 2 8 4 17 5 18 19 20 5 4 1 8 0 4 3 1 3 8 5 2 Expanded number 5 2 + 10 100 7 5 8 + + 10 100 5 1 10 +2 + + 10 100 9 1 400 + 10 +8 + + 10 100 8 3 + 20 +3 + 10 100 6 1 20 +1 + + 10 100 5 6 + 10 100 3 100 9 100 2 5 + 200 +10 +5 + 10 100 17 8000 + 600 + 70+5 1000 + 500 + 60 + 9 1000 + 40 + 5 4 90 + 9 + 10 5 100 3 1 + 10 100 4000 + 100 + 4 8 3 + + 10 100 5 2 800 + + 10 100 100 + 30 + 4 + Exercise 2 1) 5) 9) 6301.14 0.8 824.6 (2) 89 (6) 571.08 (10) 4301.02 (3) 234.6 (7) 607.7 (11) 9000.8 (4) 3401.06 (8) 3079.04 (12) 7205.08 Exercise 3 On the diagram provided colour in the decimal fraction 1) 0.7 2) 0.2 3) 0.4 4) 0.15 1) 2) 3) 4) 5) 0.95 5) On the diagram provided colour in the decimal fraction 8) a) 0.64 in red and 0.23 in blue b) Now write as a fraction the total area shaded. Where possible simplify 87 the fraction 100 c) Now write the area not shaded as a decimal fraction. 0.13 9) a) 0.38 in red and 0.49 in blue b) Now write as a fraction the total area shaded. Where possible simplify 87 the fraction 100 c) Now write the area not shaded as a decimal fraction. 0.13 Exercise 4 1) 24 = 0.24 100 (2) 15 = 0.15 100 (3) 14 = 0.14 100 4) 36 = 0.36 100 (5) 70 = 0.7 100 (6) 38 = 0.38 100 7) 140 = 1.40 100 (8) 101 = 1.01 100 (9) 34 = 0.34 100 10) 148 = 1.48 100 Underline the hundreds in each question (2) 1) 86,243.1 2,726.73 (3) 90,000 4) 1,234.6 (5) 1,167.9 (6) 2,450.012 7) 45,659.345 (8) 12,345.8 (9) 456.67 10) 9,012.89 (11) 5,578.897 (12) 58,921.21 Exercise 5 Exercise 6 Put a circle around the digit in the hundredths place. Actually they are underlined here 1) 24.741 (2) 1.8932 (3) 78.04 4) 567.15 Exercise 7 Add one hundredth ( 1) 4) 7) 10) 13) 16) 0.71 24.46 2145.21 8847.01 0.78 1000.1 (5) 1 ) to each of these numbers 100 (2) 0.39 (5) 12.65 (8) 10.01 (11) 9742 11.01 (14) 329.90 (17) 60000.51 (3) (6) (9) (12) (15) (18) 12.1 168.43 24 644.1 2327.83 45.90 1 ) from each of these numbers 100 (2) 32.13 (5) 45.73 (8) 39.4 (11) 99.99 (3) (6) (9) (12) 123.70 56.09 8.19 10.0 Exercise 8 Take one hundredth ( 1) 4) 7) 10) 39.67 0.81 286. 478.29 4536. 407 Exercise 9 1) 4) 7) 445.2 329.21 3001 (2) (5) (8) 698.35 4249.55 49.1 (3) (6) (9) 10000 204.05 5015.35 (2) (5) (8) (11) (14) 90.75 3001.03 6.54 0.57 0.04 (3) (6) (9) (12) (15) 603 .48 6004.7 20 88.26 7890.2 Exercise 10 1) 4) 7) 10) 13) 321.72 819.01 29.99 0.99 436.11 Exercise 11 1) 2) 3) 4) 5) 6) 7) .9 6 9 3 Any 3 digit number with 6 in the hundredths place? Any 4 digit number with 6 in the hundreds place? Any 2 digit number with 5 in the hundredths place Exercise 12 1) a) 0.08 (b) 0.39 (c) 0.58 2) a) 40.08 (b) 43.9 (c) 45.8 d) 49.2 3) a) 200.08 (b) 200.39 (c) 200.58 (d) 200.92 Exercise 13 (d) 0.92 1) 12 100 (2) 4 100 (3) 4 100 4) 75 100 (5) 72 100 (6) 8 4 480 =4 =4 10 5 100 Exercise 14 1) 4) 7) 10) 13) 0.12 3.09 36.06 0.63 0.48 (2) (5) (8) (11) (14) 0.04 4.02 5.65 0.4 0.56 (3) (6) (9) (12) (15) 0.05 3.09 0.3 0.64 0.6